In Oracle there are several operators to make comparisons of "different", such as:
<>
¬=
!=
^=
Example:
Select * from tabel where nomeTabela <> 's';
Select * from tabel where nomeTabela != 's';
Select * from tabel where nomeTabela ^= 's';
Select * from tabel where nomeTabela ¬= 's';
All will return the same result, said would you like to know if there is any performance difference, version between them? If not, is there a discontinuity forecast for any of them?